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On-Key Sound Studios specializes in audio post production. The company has been operating since 2001

Our studios are based in Linden and Ferndale, Johannesburg.


The team consists of owner Janno Müller, Jonty Everton, Thapelo Makhubo and Jeanré Greyling.


Our services include: dialogue editing, track lay, foley, ADR, additional location recordings, sound design and final mix for all genres and platforms including multimedia, radio, television and film in various sound formats up to Dolby 7.1 Additionally, we collaborate with top music composers to offer a complete audio post package.

All these elements are combined to create the best sound track for each production.